Comparison 18. CP paint‐on versus HP strip.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Tooth whitening ‐ assessed by the dentist	2		Std. Mean Difference (IV, Random, 95% CI)	Subtotals only
1.1 18% CP paint‐on versus 6% HP strip	2	102	Std. Mean Difference (IV, Random, 95% CI)	1.50 [1.06, 1.94]